JVM

Java Virtual Machine (JVM) Attributes

This document defines Java Virtual machine related attributes.

Attribute	Type	Description	Examples	Stability
jvm.buffer.pool.name	string	Name of the buffer pool. [1]	mapped; direct
jvm.gc.action	string	Name of the garbage collector action. [2]	end of minor GC; end of major GC
jvm.gc.name	string	Name of the garbage collector. [3]	G1 Young Generation; G1 Old Generation
jvm.memory.pool.name	string	Name of the memory pool. [4]	G1 Old Gen; G1 Eden space; G1 Survivor Space
jvm.memory.type	string	The type of memory.	heap; non_heap
jvm.thread.daemon	boolean	Whether the thread is daemon or not.
jvm.thread.state	string	State of the thread.	runnable; blocked

[1]: Pool names are generally obtained via BufferPoolMXBean#getName().

[2]: Garbage collector action is generally obtained via GarbageCollectionNotificationInfo#getGcAction().

[3]: Garbage collector name is generally obtained via GarbageCollectionNotificationInfo#getGcName().

[4]: Pool names are generally obtained via MemoryPoolMXBean#getName().

jvm.memory.type has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value	Description	Stability
heap	Heap memory.
non_heap	Non-heap memory

jvm.thread.state has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value	Description	Stability
blocked	A thread that is blocked waiting for a monitor lock is in this state.
new	A thread that has not yet started is in this state.
runnable	A thread executing in the Java virtual machine is in this state.
terminated	A thread that has exited is in this state.
timed_waiting	A thread that is waiting for another thread to perform an action for up to a specified waiting time is in this state.
waiting	A thread that is waiting indefinitely for another thread to perform a particular action is in this state.